Credit: SWNS / Patrick Hagen

A toddler comforted her mother suffering from morning sickness and patted her on the back.

Katherine Hagen, 32, was pregnant with her second child when her daughter, Rosie Hagen, two, came to comfort her.

A video shows young Rosie patting her mum on her back and saying "It's OK, it's OK."

Katherine had bad morning sickness throughout her pregnancy and Rosie took to comforting her whenever she could.